Definition
Capable of being broken down into harmless natural substances by the action of living organisms, particularly bacteria and fungi, over a reasonable period of time.
Plain English
A material that nature can break down on its own, so it doesn't stay around as pollution.
Context Anchor
Seen in aviation maintenance, cleaning, and spill-control discussions when describing soaps, cleaners, absorbent materials, or other products used around aircraft.
Derivation
From 'bio-' (Greek bios, meaning life) and 'degradable' (from Latin gradus, a step — to step down, break down). Together it means 'able to be broken down by living things.' The word origin reinforces that the breakdown is biological, not chemical or mechanical.
Why Pilots Care
Many shop and ramp products — solvents, cleaners, de-icing fluids, oils — are chosen partly on whether they are biodegradable, because spills and runoff at airports are regulated. Knowing a product is biodegradable affects how it can be used, stored, and disposed of.
Intuition Check
Biodegradable does not mean instantly safe or okay to dump anywhere. It means the material can be broken down naturally over time under the right conditions.
Example Sentence 1
The maintenance hangar switched to a biodegradable degreaser to reduce the environmental impact of wash-down runoff.
Example Sentence 2
Biodegradable cleaning agents were used on the engine parts to reduce waste disposal concerns.